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10980xe with X299 Dark adaptive vc

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Florindo
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2020/10/07 02:37:04 (permalink)
Hello everyone. I have this problem, a 10980xe with X299 Dark 4.8Ghz all core, 1.22 vc, bios 1.23. It works perfectly with the override vc, but I can't in any way set it to adaptive. The maximum voltage is ignored, practically works in auto. I also tried with negative offset but then it becomes unstable in idle.
With the 7980xe delided this problem does not exist, i use it with vc 1.24 adaptive, 0 offset, 4.8Ghz all core.
Can anyone help me?
Couldn't an adaptive negative offset be implemented?
Sorry for my English.
#1

7 Replies Related Threads

    bdary
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    Re: 10980xe with X299 Dark adaptive vc 2020/10/07 11:43:55 (permalink)
    I'm thinking if adaptive vcore isn't working the way you'd expect it's because that chip already has a turbo boost of 4.8GHz.  You would need to be above that for it to function properly (4.9GHz, etc.). ->  https://ark.intel.com/content/www/us/en/ark/products/198017/intel-core-i9-10980xe-extreme-edition-processor-24-75m-cache-3-00-ghz.html
     
    Your old chip worked correctly becaue you were OC'ing higher than the normal boost clock of 4.4GHz. -> https://ark.intel.com/content/www/us/en/ark/products/126699/intel-core-i9-7980xe-extreme-edition-processor-24-75m-cache-up-to-4-20-ghz.html
     
    You could try OC'ing your 10980XE at 4.9 to verify what I'm saying here just to be sure.


     
     
     
     
     
     
     
     
     
    #2
    Florindo
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    Re: 10980xe with X299 Dark adaptive vc 2020/10/08 04:45:51 (permalink)
    Hi, unfortunately it does not depend on this. I did research on the net, it seems that the problem is due to the exaggeratedly high VID of these processors. If you try to set an adaptive VC with a lower value than the VID, the processor will work again in auto.
    This is why I proposed an adaptive negative offset, in order to set a higher voltage than the VID, and lower it with a large negative offset, which progressively decreases when it returns to idle.
    #3
    DEJ915
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    Re: 10980xe with X299 Dark adaptive vc 2020/10/08 07:51:44 (permalink)
    Adaptive is just a turbo target voltage beyond auto voltage so it only works beyond programmed VIDs which is why what bdary said is correct.  You can use a negative offset but you'll likely be unstable at low clocks/idle as it subtracts from all voltages.
    #4
    Florindo
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    Re: 10980xe with X299 Dark adaptive vc 2020/10/08 08:31:06 (permalink)
    Yes, it should be, if the voltage is higher than the VID it should work, it should assign the same voltage to all cores adaptively, but in reality it runs in auto with different voltages for each core and accepts the negative offset.
    #5
    bdary
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    Re: 10980xe with X299 Dark adaptive vc 2020/10/08 08:46:22 (permalink)
    I've had some success using a negative offset, but only up to -.030v.  Beyond that things became unstable.
    post edited by bdary - 2020/10/08 08:50:36


     
     
     
     
     
     
     
     
     
    #6
    Monstieur
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    Re: 10980xe with X299 Dark adaptive vc 2020/10/11 13:32:45 (permalink)
    The VIDs are maybe +20 mV above stability. There is not much room to undervolt using Override. People who claim to have 4.8 GHz stable with undervolting have unstable CPUs. Override results in a constant voltage (meant for 4.8 GHz) at all ratios including AVX, resulting in massive heat generation during AVX workloads. Using a negative offset also undervolts AVX ratios, in addition to the idle instability.
     
    At 4.8 GHz all-core, you will find that AVX-512 at say 4.3 GHz is unstable without a +ve offset. A +ve offset is the only way to increase AVX ratio voltage in Adaptive mode, as the configured Adaptive voltage does not apply at lower ratios.
    post edited by Monstieur - 2020/10/11 13:39:00
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    Florindo
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    Re: 10980xe with X299 Dark adaptive vc 2020/10/11 13:54:42 (permalink)
    Yes, a thousand times better a 7980xe direct die....
    #8
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